When Abbey had her cold (she had one when she was about 3 weeks and again about 7) I also raised the head of the bassinet a little to help limit how much mucous would drain down her throat (eewww) and I gave her as much tummy time as I could during the day to help anything in the nose flow out (she HATED the Fess and still does - cries as soon as she sees it!). If your little girl get a stuffy nose you could stand in a steamy room with her as well.
My doctor recommended eucabear on a tissue or cloth and putting it under the sheets at bedtime (don't put it on her skin). I never went down that path though.
Other than that - lots of cuddles from Mummy!

HTH and hope she recovers quickly!

MG